Initiator process variable

Excuse me for stupid questions but I am new in Flowable. I have some experience with Alfresco Activiti and I cannot find answer.
In Alfresco Activiti I can use variable initiator and it’s properties in listener using Alfresco execution script like this:

execution.setVariable(‘userFullName’, +" " +;

In Alfresco Activiti I can also use logger to write information into console

logger.log("initiator email: " +;

and bmp_package too


Can I use something similar in Flowable.